[time-nuts] lunatic fringe time standards

Rob Kimberley rk at timing-consultants.com
Mon Apr 19 15:20:46 EDT 2010

I stand corrected. On reflection, I seem to remember a lower supply voltage
on the RTL, although 3.6 doesn't ring a bell. Do remember that it was very
temperamental logic family. Used to get lots of catastrophic failures on the
DMM product range (which I believe SD acquired from Fairchild).


-----Original Message-----
From: time-nuts-bounces at febo.com [mailto:time-nuts-bounces at febo.com] On
Behalf Of Chuck Harris
Sent: 19 April 2010 5:57 PM
To: Discussion of precise time and frequency measurement
Subject: Re: [time-nuts] lunatic fringe time standards

DTL had essentially the same specs as TTL.  It was an evolutionary step.

RTL was a strange beast, and ran off of 3.6V.  There is no inherent reason
that there couldn't have been multiple families that used different
but I only remember the 3.6V variety.

-Chuck Harris

Rob Kimberley wrote:
> RTL and DTL used 5.0V. I used to service Systron-Donner kit back in the
> early 70's, and we had a bunch of RTL and DTL stuff.
> Rob K

time-nuts mailing list -- time-nuts at febo.com
To unsubscribe, go to
and follow the instructions there.

More information about the time-nuts mailing list